Abbreviations
| ΣΔ | Sigma-Delta (type of ADC) |
| 2G | Second Generation Mobile Communications (Digital Cellular – eg GSM, PDC, IS-95, TDMA) |
| 2.5G | Enhanced Second Generation Mobile Communications, for packet and high speed data (eg GPRS, HSCSD, EDGE) |
| 3G | Third Generation Mobile Communications – a family of standards developed under the umbrella of IMT-2000 |
| 3GPP | 3rd Generation Partnership Project |
| 802.11 | Wireless LAN standard (see www.wifiweb.org) |
| A/D | Analog to Digital (Converter) |
| AcA | Server type used for reconfiguration validation: Authentication/Authorisation/Encryption – Virtual configuration – Accounting/Billing |
| ACF | Auto Correlation Function |
| ACM | Adaptive Computing Machine |
| ACP | Adjacent Channel Power |
| ACPR | Adjacent Channel Power Ratio |
| ADC | Analog to Digital Converter |
| ADSL | Asynchronous Digital Subscriber Line |
| AFE | Analog Front End |
| AGC | Automatic Gain Control |
| AIS | Air Interface Standard |
| AI-SR | Adaptive Intelligent Software Radio |
| ALU | Arithmetic Logic Unit |
| AM | Amplitude Modulation |
| AMPS | Advanced Mobile Phone Service, US first generation mobile phone standard |
| AMR | Adaptive Multi-Rate |
| AN 2/6 | North American 2-band 6-mode radio design |
| APCO 25 | North American Digital Law Enforcement Standard |
| API | Application Programming Interface |
| ARPA | (US) Advanced Research Projects Agency (previously DARPA) |
| ASIC | Application Specific Integrated Circuit |
| ATM | Asynchronous Transfer Mode |
| BCCH | Broadcast Control Channel |
| BCH | Broadcast Channel |
| BER | Bit Error Rate |
| BiCMOS ... |
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